So long as sufficient 166s are available next week, there will be the Gloucester-Taunton working in the mornings noted above, plus a retum evening working, and a Gloucester-Bristol TM-Swindon one to get a Turbo on to the Swindon-Cheltenham dmu shuttles each morning - http://www.realtimetrains.co.uk/train/C56343/2018/01/02/advanced